use projectdiscovery/useragent

[dogancanbakir]

Proposed changes

Closes #4706

Checklist

• Pull request is created against the dev branch
• All checks passed (lint, unit/integration/regression tests etc.) with my changes
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)

[tarunKoyalwar]

lgtm ! later on maybe we can add a flag or env variable to choose user agents based on specific tags (ex: mobile etc)

[ehsandeep]

lgtm ! later on maybe we can add a flag or env variable to choose user agents based on specific tags (ex: mobile etc)

For now, we are keeping latest / computer browser UA's only as different type of UA's producing diffrent response causing issues with result consistency.